EP0172122A1 - Process to manufacture decorative products from fragments or pieces of wood of manufactured products - Google Patents

Process to manufacture decorative products from fragments or pieces of wood of manufactured products Download PDF

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Publication number
EP0172122A1
EP0172122A1 EP85420142A EP85420142A EP0172122A1 EP 0172122 A1 EP0172122 A1 EP 0172122A1 EP 85420142 A EP85420142 A EP 85420142A EP 85420142 A EP85420142 A EP 85420142A EP 0172122 A1 EP0172122 A1 EP 0172122A1
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EP
European Patent Office
Prior art keywords
pieces
temperature
fragments
wood
resin
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP85420142A
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German (de)
French (fr)
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EP0172122B1 (en
Inventor
Michel Ernest Ostermann
Etienne Meriaux
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Boxy Industries SA
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Boxy Industries SA
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Publication date
Application filed by Boxy Industries SA filed Critical Boxy Industries SA
Priority to AT85420142T priority Critical patent/ATE37317T1/en
Publication of EP0172122A1 publication Critical patent/EP0172122A1/en
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Publication of EP0172122B1 publication Critical patent/EP0172122B1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
    • B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L97/00—Compositions of lignin-containing materials
    • C08L97/02—Lignocellulosic material, e.g. wood, straw or bagasse
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49789—Obtaining plural product pieces from unitary workpiece
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49789—Obtaining plural product pieces from unitary workpiece
    • Y10T29/49798—Dividing sequentially from leading end, e.g., by cutting or breaking

Definitions

  • the present invention relates to the field of the production of decorative products which can be used in sheets, strips, panels, blocks, in particular for the decoration of premises for use or housing.
  • the invention relates, more particularly, to the recovery and use of fragments or pieces of raw or machined wood, originating from forestry operations or from the processing and machining industries of raw wood.
  • the first is the inclusion in the plastic of bubbles of different sizes which destroy the aesthetic appearance of the product and also harm its mechanical characteristics.
  • the second is due to the fact that slicing from a molded block, to obtain plates for example, reveals that the wood waste or scrap is, at least in part, impregnated inside their channels with resin.
  • the color contrast and the aesthetic appearance due to the essence and the grain of the included products are definitely greatly altered.
  • a third defect is due to the fact that, in almost all of them, the recommended plastics have a high shrinkage coefficient during the hardening phase. This withdrawal forces the waste or falls to the point of damaging them, causing them to be torn, burst and / or fragmented. This shrinkage is also responsible for internal stresses producing a noticeable deformation of the finished product which then most often requires a significant machining operation to give it a suitable external appearance. These internal stresses are also responsible for cracks, cleavage planes, etc. in the mass of hardened plastic and, sometimes, a break in the connection between the resin and the pieces included.
  • the object of the invention is, precisely, to provide the necessary and sufficient technical means to allow the production, from fragments and / or pieces of wood and an appropriate plastic, decorative products, of an aesthetic nature. certain, free from defects and deformations and which can be obtained by limiting, moreover, the consumption or the use of the quantity of plastic material.
  • the invention also relates to any decorative product obtained from the above process.
  • the method according to the invention consists in carrying out a decorative product, of any suitable form, using fragments and / or pieces of wood placed in a mold and submerged or submerged in a mass of plastic material contained in such a mold.
  • Fragments and / or pieces should be understood to mean both scrap, waste and / or raw and / or machined pieces of wood.
  • the ratio of the volume occupied by the fragments and / or pieces relative to that of the mold can be variable.
  • j . fragments and / or pieces can be arranged to be placed in close proximity, if not in partial contact, by their peripheral surface.
  • the fragments and / or pieces may be of different shapes and be placed without any preferential direction or, on the contrary, by being aligned in a preferred direction for specific aesthetic or mechanical reasons.
  • thermosetting material is used as plastic material at room temperature and, in this family, an epoxy resin which is fluid at room temperature and whose polymerization process takes place in the presence of one or more catalysts or one or more hardeners.
  • the hardener is also chosen to have the least reactive nature possible at room temperature.
  • Such a raw material is known to produce, during the polymerization phase, an exothermic reaction raising its temperature under conditions depending on the mass of plastic material, the conformation of the volume it occupies and the existing exchange surface. .
  • the invention recommends to use a resin liquid at room temperature and capable of polymerizing, also at room temperature, as soon as it is placed in the presence of its polymerization reagent (s).
  • a resin liquid at room temperature and capable of polymerizing, also at room temperature, as soon as it is placed in the presence of its polymerization reagent (s).
  • an epoxy resin and a hardener sold under the brand RBS by the company T2L CHIMIE, are perfectly suitable.
  • fragments and / or pieces of wood having a homogeneous temperature which is at least equal and preferably higher than the peak temperature of the polymerization exotherm are used.
  • the gases included are not subjected to any expansion and remain confined in the cells which they occupy by the peripheral pressure exerted by the resin.
  • the exotherm of polymerization by natural or forced ventilation is limited, so as also to reduce the preheating temperature of the fragments and / or pieces.
  • controlled cooling makes it possible to limit the temperature of the woods to a sufficiently low value to avoid their possible deterioration and also reduce the expense of cooling energy.
  • This temperature maintenance phase is carried out, for example, in a range between - 10 and + 20 ° C.
  • the preheating of the wood is then carried out up to a homogeneous temperature, at least equal, but preferably superior to that of controlled temperature maintenance which is carried out by placing the lined mold in a chamber, in an enclosure or in a room allowing maintenance of a cooling capable of absorbing the calories produced by the polymerization exotherm, so that this polymerization can begin and take place without the fragments or pieces having to undergo a temperature higher than their initial.
  • the mold-resin-wood assembly is planned to maintain the mold-resin-wood assembly during a first polymerization phase, at a constant temperature to reach the state of gelation or pre-hardening of the plastic.
  • the mold-resin-waste assembly is subjected to a slightly higher temperature to promote the second polymerization phase leading to the final curing state.
  • the absence of transfer and evacuation of the gases included makes it possible to isolate the different channels or cells and thus avoid the penetration of the resin. This has two positive consequences. The first is the absence of visible stains in the sections of the fragments and / or pieces when, for example, a block, produced according to the process, is then sliced or cut into plates.
  • the second lies in the fact that the production of a block or decorative product involves only the filling of the volume of the mold reserved for the plastic material and thus limits the use or consumption of a basic product whose cost is higher than that of fragments and / or pieces.
  • fragments and / or pieces are not previously treated before they are submerged. These fragments and / or pieces therefore have, on the surface, asperities, hollows or open cells which are at least partly filled with resin when the mold is filled with the latter. in the fluid state.
  • the polymerization which results has the effect of hardening these inclusions and of achieving, in this way, a perfect anchoring establishing an intimate bond between the resin and the woods, without this resin having been able to penetrate deep into the cells of the underlying layers, to the point of altering the aesthetic character of the products included. This results in a high overall consistency, giving the product obtained good mechanical strength characteristics, as well as high possibilities of machining or surfacing.
  • the start and end phases of polymerization are carried out by means of a forced ventilation installation, the operation of which is dependent on a thermal probe which more particularly assesses the temperature of the plastic.
  • the block of new product obtained can be cut into plates or panels having, after surface machining and polishing, a smooth, flat surface state, revealing sections of wood free of resin infiltration, stresses or fractures. internal and intimately linked to the resin coating itself free of bubbles, stresses or deformation.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Materials Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Forests & Forestry (AREA)
  • Chemical And Physical Treatments For Wood And The Like (AREA)
  • Dry Formation Of Fiberboard And The Like (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Adornments (AREA)
  • Debarking, Splitting, And Disintegration Of Timber (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Heterocyclic Carbon Compounds Containing A Hetero Ring Having Nitrogen And Oxygen As The Only Ring Hetero Atoms (AREA)
  • Polymerisation Methods In General (AREA)
  • Peptides Or Proteins (AREA)
  • Manufacture Of Macromolecular Shaped Articles (AREA)
  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
  • Joining Of Glass To Other Materials (AREA)
  • Epoxy Resins (AREA)

Abstract

The invention relates to the production of decorative panels. The process for production according to the invention is characterized in that: an epoxy resin which is liquid and polymerizing at ambient temperature in the presence of a polymerization reagent having the least reactive character at the same temperature, fragments and/or pieces of wood previously heated to a homogeneous temperature higher than the peak temperature of exothermia of polymerization of the resin-reagent mixture, are used. The invention is more particularly applicable to the manufacture of decorative trays for tables.

Description

La présente invention concerne le domaine de la production de produits à caractère décoratif pouvant être utilisés en feuilles, en bandes, en panneaux, en blocs, notamment pour la décoration de locaux d'utilisation ou d'habitation.The present invention relates to the field of the production of decorative products which can be used in sheets, strips, panels, blocks, in particular for the decoration of premises for use or housing.

Bien que non spécialement limitée à cette application, l'invention vise, plus particulièrement, la récupération et l'utilisation de fragments ou morceaux de bois brut ou usiné, provenant des exploitations forestières ou des industries de transformation-usinage du bois brut.Although not specially limited to this application, the invention relates, more particularly, to the recovery and use of fragments or pieces of raw or machined wood, originating from forestry operations or from the processing and machining industries of raw wood.

Une proposition de récupération et d'utilisation de tels produits à de telles fins a déjà été préconisée, notamment par le brevet français 71-38 306 (2 113 222).A proposal for the recovery and use of such products for such purposes has already been advocated, in particular by French patent 71-38,306 (2,113,222).

Dans ce brevet français, il est envisagé la possibilité de réaliser un panneau décoratif en plaçant, dans un moule, des branches ou brindilles noyées dans une masse d'une matière plastique, indifféremment à caractère thermo-durcissable ou thermo-plastique. L'enseignement à caractère très général fourni par un tel document ne peut être considéré comme apportant les éléments d'informations nécessaires et suffisants à l'homme de métier pour mettre en oeuvre une telle technique.In this French patent, it is envisaged the possibility of producing a decorative panel by placing, in a mold, branches or twigs embedded in a mass of plastic material, either of thermosetting or thermoplastic nature. The teaching of a very general nature provided by such a document cannot be considered as providing the elements of information necessary and sufficient to those skilled in the art to implement such a technique.

En effet, la mise en oeuvre des moyens préconisés conduit à l'obtention d'un produit fini ne pouvant être commercialisé en raison des défauts qu'il présente.Indeed, the implementation of the recommended means leads to the production of a finished product which cannot be marketed because of the defects it presents.

Le premier est l'inclusion dans la matière plastique de bulles de tailles différentes qui détruisent l'aspect esthétique du produit et nuisent, également, à ses caractéristiques mécaniques.The first is the inclusion in the plastic of bubbles of different sizes which destroy the aesthetic appearance of the product and also harm its mechanical characteristics.

Le second tient au fait que le tranchage à partir d'un bloc moulé, pour obtenir par exemple des plaques, fait apparaître que les déchets ou chutes de bois sont, en partie au moins, imprégnés à l'intérieur de leurs canaux par la résine. Le contraste de couleurs et l'aspect esthétique dûs à l'essence et au veinage des produits inclus s'en trouvent fortement altérés de façon définitive.The second is due to the fact that slicing from a molded block, to obtain plates for example, reveals that the wood waste or scrap is, at least in part, impregnated inside their channels with resin. The color contrast and the aesthetic appearance due to the essence and the grain of the included products are definitely greatly altered.

Un troisième défaut tient au fait que, dans leur quasi ensemble, les matières plastiques préconisées possèdent un coefficient de retrait important lors de la phase de durcissement. Ce retrait contraint les déchets ou chutes au point de les détériorer en provoquant leur déchirement, leur éclatement et/ou leur fragmentation. Ce retrait est aussi responsable de contraintes internes produisant une déformation notable du produit fini qui nécessite alors, le plus souvent, une opération d'usinage importante pour lui conférer un aspect extérieur convenable. Ces contraintes internes sont aussi responsables de fentes, plans de clivage, etc ... dans la masse de matière plastique durcie et, parfois, d'une rupture de liaison entre la résine et les morceaux inclus.A third defect is due to the fact that, in almost all of them, the recommended plastics have a high shrinkage coefficient during the hardening phase. This withdrawal forces the waste or falls to the point of damaging them, causing them to be torn, burst and / or fragmented. This shrinkage is also responsible for internal stresses producing a noticeable deformation of the finished product which then most often requires a significant machining operation to give it a suitable external appearance. These internal stresses are also responsible for cracks, cleavage planes, etc. in the mass of hardened plastic and, sometimes, a break in the connection between the resin and the pieces included.

L'objet de l'invention est, justement, de fournir les moyens techniques nécessaires et suffisants pour permettre de produire, à partir de fragments et/ou de morceaux de bois et d'une matière plastique appropriée, des produits décoratifs, à caractère esthétique certain, exempts de défauts et déformations et pouvant être obtenus en limitant, par ailleurs, la consommation ou l'utilisation de la quantité de matière plastique.The object of the invention is, precisely, to provide the necessary and sufficient technical means to allow the production, from fragments and / or pieces of wood and an appropriate plastic, decorative products, of an aesthetic nature. certain, free from defects and deformations and which can be obtained by limiting, moreover, the consumption or the use of the quantity of plastic material.

Pour atteindre l'objectif ci-dessus, le procédé de production selon l'invention est caractérisé en ce qu'on utilise :

  • - une résine époxy liquide et polymérisant à température ambiante en présence d'un réactif de polymérisation ayant un caractère le moins réactif à la même température,
  • - des fragments et/ou morceaux de bois préalablement chauffés à une température homogène supérieure à la température de crête d'exothermie de polymérisation du mélange résine-réactif.
To achieve the above objective, the production process according to the invention is characterized in that one uses:
  • a liquid epoxy resin which polymerizes at room temperature in the presence of a polymerization reagent having a less reactive nature at the same temperature,
  • - fragments and / or pieces of wood previously heated to a homogeneous temperature higher than the peak temperature of exothermic polymerization of the resin-reagent mixture.

L'invention a, également, pour objet, tout produit décoratif obtenu à partir du procédé ci-dessus.The invention also relates to any decorative product obtained from the above process.

Le procédé selon l'invention consiste à réaliser un produit décoratif, de toute forme appropriée, en utilisant des fragments et/ou morceaux de bois placés dans un moule et noyés ou submergés dans une masse de matière plastique contenue dans un tel moule. Par fragments et/ou morceaux, il faut entendre à la fois les chutes, les déchets et/ou les pièces de bois brutes et/ou usinées. Le rapport du volume occupé par les fragments et/ou morceaux par rapport à celui du moule peut être variable. Dans certains cas, les j. fragments et/ou morceaux peuvent être disposés pour être placés en proche proximité, sinon en contact partiel, par leur surface périphérique.The method according to the invention consists in carrying out a decorative product, of any suitable form, using fragments and / or pieces of wood placed in a mold and submerged or submerged in a mass of plastic material contained in such a mold. Fragments and / or pieces should be understood to mean both scrap, waste and / or raw and / or machined pieces of wood. The ratio of the volume occupied by the fragments and / or pieces relative to that of the mold can be variable. In some cases, j . fragments and / or pieces can be arranged to be placed in close proximity, if not in partial contact, by their peripheral surface.

Les fragments et/ou morceaux peuvent être de formes différentes et être placés sans aucun sens préférentiel ou, au contraire, en étant alignés selon une direction privilégiée pour des raisons esthétiques ou mécaniques spécifiques.The fragments and / or pieces may be of different shapes and be placed without any preferential direction or, on the contrary, by being aligned in a preferred direction for specific aesthetic or mechanical reasons.

Selon l'invention, on utilise, en tant que matière plastique, une matière thermo-durcissable à température ambiante et, dans cette famille, une résine époxy fluide à température ambiante et dont le processus de polymérisation intervient en présence d'un ou de plusieurs catalyseurs ou d'un ou de plusieurs durcisseurs. Selon l'invention, le durcisseur est également choisi pour posséder un caractère le moins réactif possible à température ambiante.According to the invention, a thermosetting material is used as plastic material at room temperature and, in this family, an epoxy resin which is fluid at room temperature and whose polymerization process takes place in the presence of one or more catalysts or one or more hardeners. According to the invention, the hardener is also chosen to have the least reactive nature possible at room temperature.

Une telle matière première est connue pour produire, lors de la phase de polymérisation, une réaction exothermique élevant sa température dans des conditions dépendant de la masse de matière plastique, de la conformation du volume qu'elle occupe et de la surface d'échange existant.Such a raw material is known to produce, during the polymerization phase, an exothermic reaction raising its temperature under conditions depending on the mass of plastic material, the conformation of the volume it occupies and the existing exchange surface. .

Une telle élévation de température est naturellement appliquée aussi aux matières incluses. Cette température a pour effet de dilater les gaz inclus à ces matières et de provoquer leur évacuation dans le milieu environnant constitué par la résine. Cette réaction exothermique est responsable de la présence de bulles incluses et des tensions internes, ainsi, d'ailleurs, que de l'absorption par les fibres d'une partie au moins de la résine tachant ou altérant l'aspect esthétique des produits inclus.Such a rise in temperature is naturally also applied to the materials included. This temperature has the effect of expanding the gases included in these materials and of causing them to be evacuated into the surrounding medium constituted by the resin. This exothermic reaction is responsible for the presence of bubbles included and internal tensions, as well as for the absorption by the fibers of at least part of the resin staining or altering the aesthetic appearance of the products included.

Afin d'éliminer cet inconvénient, l'invention préconise de mettre en oeuvre une résine liquide à température ambiante et susceptible de polymériser, également à température ambiante, dès qu'elle est mise en présence de son ou de ses réactifs de polymérisation. A cette fin, une résine époxy et un durcisseur, commercialisés sous la marque RBS par la Société T2L CHIMIE, conviennent parfaitement.In order to eliminate this drawback, the invention recommends to use a resin liquid at room temperature and capable of polymerizing, also at room temperature, as soon as it is placed in the presence of its polymerization reagent (s). To this end, an epoxy resin and a hardener, sold under the brand RBS by the company T2L CHIMIE, are perfectly suitable.

Selon une autre disposition de l'invention, on utilise des fragments et/ou morceaux de bois possédant une température homogène qui est au moins égale et, de préférence, supérieure à la température de crête de l'exothermie de polymérisation. De cette façon, lors de la submersion des fragments et/ou morceaux dans la résine, les gaz inclus ne sont soumis à aucune dilatation et restent confinés dans les cellules qu'ils occupent par la pression périphérique exercée par la résine.According to another arrangement of the invention, fragments and / or pieces of wood having a homogeneous temperature which is at least equal and preferably higher than the peak temperature of the polymerization exotherm are used. In this way, when the fragments and / or pieces are submerged in the resin, the gases included are not subjected to any expansion and remain confined in the cells which they occupy by the peripheral pressure exerted by the resin.

De façon pratique, selon l'invention, on limite l'exo- thermie de polymérisation par ventilation naturelle ou forcée, de façon à réduire aussi la température de préchauffage des fragments et/ou morceaux. Comme l'exothermie de polymérisation peut atteindre des crêtes relativement élevées, par exemple de 80 à 150° C, un refroidissement contrôlé permet de limiter la température des bois à une valeur suffisamment basse pour éviter leur détérioration éventuelle et de réduire aussi la dépense d'énergie de refroidissement. Cette phase de maintien en température est conduite, par exemple, dans une plage comprise entre - 10 et + 20° C. Selon le procédé, le préchauffage du bois est effectué alors jusqu'à une température homogène, au moins égale, mais de préférence supérieure, à celle de maintien contrôlé en température qui est conduit en plaçant le moule garni dans une chambre, dans une enceinte ou dans un local permettant d'entretenir un refroidissement apte à absorber les calories produites par l'exothermie de polymérisation, afin que cette polymérisation puisse s'engager et se dérouler sans que les fragments ou morceaux aient à subir une température supérieure à la leur initiale.In practice, according to the invention, the exotherm of polymerization by natural or forced ventilation is limited, so as also to reduce the preheating temperature of the fragments and / or pieces. As the polymerization exotherm can reach relatively high peaks, for example from 80 to 150 ° C., controlled cooling makes it possible to limit the temperature of the woods to a sufficiently low value to avoid their possible deterioration and also reduce the expense of cooling energy. This temperature maintenance phase is carried out, for example, in a range between - 10 and + 20 ° C. According to the process, the preheating of the wood is then carried out up to a homogeneous temperature, at least equal, but preferably superior to that of controlled temperature maintenance which is carried out by placing the lined mold in a chamber, in an enclosure or in a room allowing maintenance of a cooling capable of absorbing the calories produced by the polymerization exotherm, so that this polymerization can begin and take place without the fragments or pieces having to undergo a temperature higher than their initial.

De la sorte, le ou les gaz inclus aux matières ne sont pas soumis à une dilatation responsable de l'inclusion de bulles à l'intérieur de la matière plastique.In this way, the gas or gases included in the materials are not subjected to an expansion responsible for the inclusion of bubbles at inside the plastic.

L'absence d'évacuation des gaz inclus permet de limiter également la déshydratation des fragments ou morceaux et de supprimer, de cette façon, les contraintes internes.The absence of evacuation of the gases included also makes it possible to limit the dehydration of the fragments or pieces and to remove, in this way, the internal constraints.

Selon l'invention, il est prévu de maintenir l'ensemble moule-résine-bois pendant une première phase de polymérisation, à une température constante pour atteindre l'état de gélification ou de prédurcissement de la matière plastique. Dans un second temps, selon le procédé de l'invention, on soumet l'ensemble moule-résine- déchets à une température légèrement supérieure pour favoriser la seconde phase de polymérisation conduisant à l'état de durcissement final.According to the invention, it is planned to maintain the mold-resin-wood assembly during a first polymerization phase, at a constant temperature to reach the state of gelation or pre-hardening of the plastic. In a second step, according to the method of the invention, the mold-resin-waste assembly is subjected to a slightly higher temperature to promote the second polymerization phase leading to the final curing state.

De cette façon, en mettant en oeuvre le procédé selon l'invention, il devient possible d'obtenir et de produire des produits décoratifs de toutes formes souhaitées, exempts de bulles incluses dans la résine et n'ayant subi aucune contrainte ou tension interne susceptible d'altérer l'aspect esthétique des fragments et/ou morceaux et de fendre ou déformer la masse de résine les incluant.In this way, by implementing the method according to the invention, it becomes possible to obtain and produce decorative products of any desired shape, free of bubbles included in the resin and having undergone no internal stress or tension liable alter the aesthetic appearance of the fragments and / or pieces and split or deform the mass of resin including them.

L'absence de transfert et d'évacuation des gaz inclus permet d'isoler les différents canaux ou cellules et d'éviter ainsi la pénétration de la résine. Ceci a deux conséquences positives. La première est l'absence de taches apparentes dans les sections des fragments et/ou morceaux lorsque, par exemple, un bloc, produit selon le procédé, est ensuite tranché ou découpé en plaques.The absence of transfer and evacuation of the gases included makes it possible to isolate the different channels or cells and thus avoid the penetration of the resin. This has two positive consequences. The first is the absence of visible stains in the sections of the fragments and / or pieces when, for example, a block, produced according to the process, is then sliced or cut into plates.

La seconde réside dans le fait que la production d'un bloc ou produit décoratif n'implique que le seul remplissage du volume du moule réservé à la matière plastique et limite ainsi l'utilisation ou la consommation d'un produit de base dont le coût est plus élevé que celui des fragments et/ou morceaux.The second lies in the fact that the production of a block or decorative product involves only the filling of the volume of the mold reserved for the plastic material and thus limits the use or consumption of a basic product whose cost is higher than that of fragments and / or pieces.

Il convient de noter que les fragments et/ou morceaux ne sont pas préalablement traités avant leur submersion. Ces fragments et/ou morceaux présentent, par conséquent, en surface, des aspérités, creux ou cellules ouvertes qui sont, en partie au moins, remplis de résine lors du remplissage du moule avec cette dernière à l'état fluide. La polymérisation qui résulte a pour effet de durcir ces inclusions et de réaliser, de la sorte, un ancrage parfait établissant une liaison intime entre la résine et les bois, sans que cette résine ait pu pénétrer profondément dans les cellules des couches sous-jacentes, au point d'altérer le caractère esthétique des produits inclus. Il en résulte une cohérence d'ensemble élevée, conférant au produit obtenu des bonnes caractéristiques de résistance mécanique, ainsi que des possibilités élevées d'usinage ou de surfaçage.It should be noted that the fragments and / or pieces are not previously treated before they are submerged. These fragments and / or pieces therefore have, on the surface, asperities, hollows or open cells which are at least partly filled with resin when the mold is filled with the latter. in the fluid state. The polymerization which results has the effect of hardening these inclusions and of achieving, in this way, a perfect anchoring establishing an intimate bond between the resin and the woods, without this resin having been able to penetrate deep into the cells of the underlying layers, to the point of altering the aesthetic character of the products included. This results in a high overall consistency, giving the product obtained good mechanical strength characteristics, as well as high possibilities of machining or surfacing.

On donne ci-après différents exemples de mise en oeuvre de l'objet de l'invention.Various examples of implementation of the subject of the invention are given below.

EXEMPLE 1 :EXAMPLE 1:

Figure imgb0001
Les phases de début et de fin de polymérisation sont conduites au moyen d'une installation de ventilation forcée dont le fonctionnement est placé sous la dépendance d'une sonde thermique appréciant plus particulièrement la température de la matière plastique.
Figure imgb0001
 The start and end phases of polymerization are carried out by means of a forced ventilation installation, the operation of which is dependent on a thermal probe which more particularly assesses the temperature of the plastic.

Le bloc de produit nouveau obtenu peut être découpé en plaques ou panneaux présentant, après usinage de surface et polissage, un état de surface lisse, plan, faisant apparaître des sections de bois exemptes d'infiltration de résine, de contraintes ou fractures internes et intimement liées à l'enrobage de résine exempt lui-même de bulles, de contraintes ou de déformation.The block of new product obtained can be cut into plates or panels having, after surface machining and polishing, a smooth, flat surface state, revealing sections of wood free of resin infiltration, stresses or fractures. internal and intimately linked to the resin coating itself free of bubbles, stresses or deformation.

EXEMPLE 2 :EXAMPLE 2:

Figure imgb0002
Figure imgb0002

EXEMPLE 3 :EXAMPLE 3:

Figure imgb0003
Parmi de nombreuses applications, il faut citer la mise en oeuvre du procédé pour l'obtention de plaques directement issues de moulage ou résultant d'un découpage et d'un polissage et utilisées pour former des panneaux de décoration de mur ou, encore, des plateaux de tables.
Figure imgb0003
 Among many applications, mention should be made of the implementation of the process for obtaining plates directly obtained from molding or resulting from cutting and polishing and used to form wall decoration panels or, again, table tops.

L'invention n'est pas limitée aux exemples décrits, car diverses modifications peuvent y être apportées sans sortir de son cadre.The invention is not limited to the examples described, since various modifications can be made thereto without departing from its scope.

Claims (5)

1 - Procédé de production de produits décoratifs à usages multiples, à partir de fragments et/ou morceaux de bois, dans lequel on place ces morceaux dans un moule, on submerge ces morceaux dans de la résine que l'on laisse durcir,
caractérisé en ce que : - on utilise une résine époxy liquide et polymérisant à température ambiante en présence d'un réactif de polymérisation ayant un caractère le moins réactif à la même température, - on utilise des fragments et/ou morceaux de bois préalablement chauffés à une température homogène supérieure à la température de crête d'exo- thermie de polymérisation du mélange résine-réactif. 1 - Process for the production of decorative multipurpose products, from fragments and / or pieces of wood, in which these pieces are placed in a mold, these pieces are submerged in resin which is left to harden,
characterized in that: a liquid epoxy resin which polymerizes at room temperature in the presence of a polymerization reagent having a less reactive nature at the same temperature is used, - using fragments and / or pieces of wood previously heated to a homogeneous temperature higher than the peak exothermic temperature of polymerization of the resin-reactant mixture. 2 - Procédé selon la revendication 1, caractérisé en ce qu'on limite par refroidissement la température de crête d'exothermie.2 - Method according to claim 1, characterized in that by limiting the exothermic peak temperature. 3 - Procédé selon la revendication 2, caractérisé en ce qu'on limite la température de crête d'exothermie par paliers de températures croissantes.3 - Process according to claim 2, characterized in that the peak exothermic temperature is limited by increasing temperature stages. 4 - Procédé selon la revendication 3, caractérisé en ce qu'on limite la température de crête d'exothermie à un premier palier compris entre - 10° C et + 20" C.4 - Process according to claim 3, characterized in that the peak exothermic temperature is limited to a first level between - 10 ° C and + 20 "C. 5 - Produit constitué par une masse de résine époxy polymérisée et des fragments de bois inclus obtenu par la mise en oeuvre du procédé selon l'une des revendications 1 à 4.5 - Product consisting of a mass of polymerized epoxy resin and fragments of included wood obtained by implementing the method according to one of claims 1 to 4.
EP85420142A 1984-07-27 1985-07-25 Process to manufacture decorative products from fragments or pieces of wood of manufactured products Expired EP0172122B1 (en)

Priority Applications (1)

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AT85420142T ATE37317T1 (en) 1984-07-27 1985-07-25 PROCESSES FOR MAKING DECORATIVE OBJECTS STARTING FROM FRAGMENTS AND PIECES OF WOOD AND MANUFACTURED PRODUCTS.

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FR8412174 1984-07-27
FR8412174A FR2568164B1 (en) 1984-07-27 1984-07-27 PROCESS FOR PRODUCING DECORATIVE PRODUCTS FROM FRAGMENTS OR PIECES OF WOOD AND PRODUCTS OBTAINED

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EP0172122A1 true EP0172122A1 (en) 1986-02-19
EP0172122B1 EP0172122B1 (en) 1988-09-21

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EP (1) EP0172122B1 (en)
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DE (1) DE3565067D1 (en)
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ES (1) ES8702217A1 (en)
FI (1) FI852925L (en)
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GR (1) GR851849B (en)
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2652030A1 (en) * 1989-09-15 1991-03-22 Cazauba Christian Process for reconstitution of wood that is very old or even of wormeaten appearance and its application

Families Citing this family (33)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5113560A (en) * 1988-09-30 1992-05-19 Terry Anthony Bird Process of producing cactus jewelry
IT1237304B (en) * 1989-11-30 1993-05-27 Tecnomaiera Srl PROCEDURE FOR THE PRODUCTION OF COMPOSITE PANELS BASED ON STONE OR EQUIVALENT DECORATIVE MATERIAL.
CA2100319C (en) * 1992-08-31 2003-10-07 Michael J. Deaner Advanced polymer/wood composite structural member
CA2100320C (en) * 1992-08-31 2011-02-08 Michael J. Deaner Advanced polymer wood composite
US6004668A (en) * 1992-08-31 1999-12-21 Andersen Corporation Advanced polymer wood composite
US5406768A (en) * 1992-09-01 1995-04-18 Andersen Corporation Advanced polymer and wood fiber composite structural component
US5441801A (en) * 1993-02-12 1995-08-15 Andersen Corporation Advanced polymer/wood composite pellet process
AU7060494A (en) * 1993-06-09 1995-01-03 Triangle Pacific Corp. Hardened and fire retardant wood products
US5516472A (en) * 1993-11-12 1996-05-14 Strandex Corporation Extruded synthetic wood composition and method for making same
FR2740376B1 (en) * 1995-10-31 1999-01-22 Kirchhoff Denise Chabrier NEW PROCESSES FOR MANUFACTURING WOOD AND EPOXY RESIN DECORATION PANELS
US5948524A (en) * 1996-01-08 1999-09-07 Andersen Corporation Advanced engineering resin and wood fiber composite
US5847016A (en) * 1996-05-16 1998-12-08 Marley Mouldings Inc. Polymer and wood flour composite extrusion
US20030187102A1 (en) 1997-09-02 2003-10-02 Marshall Medoff Compositions and composites of cellulosic and lignocellulosic materials and resins, and methods of making the same
US20020010229A1 (en) 1997-09-02 2002-01-24 Marshall Medoff Cellulosic and lignocellulosic materials and compositions and composites made therefrom
US6344268B1 (en) 1998-04-03 2002-02-05 Certainteed Corporation Foamed polymer-fiber composite
US6153293A (en) * 1999-02-04 2000-11-28 Dahl; Michael E. Extruded wood polymer composite and method of manufacture
US6280667B1 (en) 1999-04-19 2001-08-28 Andersen Corporation Process for making thermoplastic-biofiber composite materials and articles including a poly(vinylchloride) component
JP2002361441A (en) * 2001-06-05 2002-12-18 Mitsubishi Heavy Ind Ltd Method for manufacturing vacuum vessel
US7178308B2 (en) * 2002-06-28 2007-02-20 Masonite International Corporation Composite door structure and method of forming a composite door structure
US8074339B1 (en) 2004-11-22 2011-12-13 The Crane Group Companies Limited Methods of manufacturing a lattice having a distressed appearance
PL1877192T3 (en) 2005-03-24 2013-05-31 Xyleco Inc Method of making fibrous material
US20150328347A1 (en) 2005-03-24 2015-11-19 Xyleco, Inc. Fibrous materials and composites
US7708214B2 (en) 2005-08-24 2010-05-04 Xyleco, Inc. Fibrous materials and composites
US8167275B1 (en) 2005-11-30 2012-05-01 The Crane Group Companies Limited Rail system and method for assembly
US7743567B1 (en) 2006-01-20 2010-06-29 The Crane Group Companies Limited Fiberglass/cellulosic composite and method for molding
US8460797B1 (en) 2006-12-29 2013-06-11 Timbertech Limited Capped component and method for forming
US20080286551A1 (en) * 2007-05-16 2008-11-20 Nova Chemicals Inc. Plastic-cellulosic composite articles
US20090130314A1 (en) * 2007-11-20 2009-05-21 Bauman Bernard D System for adhesion treatment, coating and curing of wood polymer composites
AR070957A1 (en) * 2008-01-11 2010-05-19 Nova Chem Inc METHOD FOR PRODUCING THERMOPLASTIC COMPOUND MATERIALS OF A COPOLYMER CONTAINING LOADED ANHYDRID WITH CELLULOSICAL MATERIALS
US8086794B2 (en) * 2008-12-12 2011-12-27 Datadirect Networks, Inc. System and method for data migration between computer cluster architecture and data storage devices
CN108350191A (en) 2015-09-21 2018-07-31 斯道拉恩索公司 A kind of composite products and the method for preparing the product
EP3576914B1 (en) 2017-02-03 2022-06-29 Stora Enso Oyj A composite material and composite product
US10427318B1 (en) 2018-08-22 2019-10-01 Roxann Groff Method of creating a wood-based false stone

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2993014A (en) * 1957-10-21 1961-07-18 Wilson Products Mfg Company Epoxy resin composition containing cork or balsa wood and preparation of expanded product therefrom
FR2102721A5 (en) * 1970-07-30 1972-04-07 Erdogazdasagi Es Faipari
FR2245495A1 (en) * 1973-09-29 1975-04-25 Marukei Mokko Kk
US3981840A (en) * 1971-06-03 1976-09-21 Joto Chemical Company Limited Method for molding thermoplastic resin compositions

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3700533A (en) * 1970-10-23 1972-10-24 Hodges Chem Co Decorative panel

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2993014A (en) * 1957-10-21 1961-07-18 Wilson Products Mfg Company Epoxy resin composition containing cork or balsa wood and preparation of expanded product therefrom
FR2102721A5 (en) * 1970-07-30 1972-04-07 Erdogazdasagi Es Faipari
US3981840A (en) * 1971-06-03 1976-09-21 Joto Chemical Company Limited Method for molding thermoplastic resin compositions
FR2245495A1 (en) * 1973-09-29 1975-04-25 Marukei Mokko Kk

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2652030A1 (en) * 1989-09-15 1991-03-22 Cazauba Christian Process for reconstitution of wood that is very old or even of wormeaten appearance and its application

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US4686251A (en) 1987-08-11
AU4552885A (en) 1986-01-30
GR851849B (en) 1985-11-26
DK341385D0 (en) 1985-07-26
FR2568164A1 (en) 1986-01-31
ES545621A0 (en) 1986-12-16
NO852982L (en) 1986-01-28
ATE37317T1 (en) 1988-10-15
EP0172122B1 (en) 1988-09-21
JPS6144602A (en) 1986-03-04
DK341385A (en) 1986-01-28
PT80878B (en) 1987-01-09
FI852925L (en) 1986-01-28
PT80878A (en) 1985-08-01
DE3565067D1 (en) 1988-10-27
ES8702217A1 (en) 1986-12-16
FI852925A0 (en) 1985-07-26
FR2568164B1 (en) 1987-09-04

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